Pros: Battery life improved over Galaxy S3, lot of other features! Very thin, and bigger screen in the same size chassis. I have no problems with this phone.

Cons: Plastic back squeaked when I first got it. There is a lot of stuff that Samsung installed that is very intuitive, but I just won't use it that much. Its also not a true quad core. This isn't a con, its still blazing fast. There are two quad cores in the phone. One is lower in power end power consumption, and the other quad will kick in when you need it.

Overall Review: To the user below, you obviously don't know what you are talking about. I have the Lumia 920, and now the S4. Battery life on the galaxy is much improved, and is better than the 920. With the 920 with moderate usage, I got about 12 Jr's. With the S4, I got about two more hours. Plus, if the battery is not up to snuff, guess what? Get a bigger battery! Oh wow, so hard! Anyone that complains about the bloatware, just root it and install a different Rom. Samsung has some of the easiest phones to unlock. Its simple, takes lures than an hour, and makes your phone insanely intuitive and powerful. As for the CPU, I don't see it as a con. It works great, and is more than enough power. Now, the build quality itself. If it is a con for you that it is plastic, then get your priorities straight. Its cheaper to make, and allows you to add a bigger battery, more memory, and much easier to repair. If those are Cons, maybe you should go to crapple. Not saying the HTC one is bad, but it lacks removable battery and an SD slot, which are both Cons in my book.